Oxygen- and air-broadening coefficients for the CH 3 I ν 6 fundamental at room temperature - Institut UTINAM - Univers, Temps-fréquence, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) Accéder directement au contenu
Article Dans Une Revue Journal of Quantitative Spectroscopy and Radiative Transfer Année : 2021

Oxygen- and air-broadening coefficients for the CH 3 I ν 6 fundamental at room temperature

Résumé

CHI-oxygen line-broadening coefficients at 296 K are calculated for the RR, PR, RP, PP, RQ and PQ sub-branches of the band in a wide range of rotational quantum numbers (, by a semi-classical and a semi-empirical methods. The computed values compare very favourably with the available experimental data and therefore can be safely employed as estimates of broadening coefficients missing in databases for high and . The theoretical data for CHI-O are further combined with the previously calculated room-temperature CHI-N line-broadening coefficients to obtain the air-broadening values required for atmospheric applications. The calculated results demonstrate an excellent consistency with both existing sets of CHI-air measurements. As the vibrational dependence of CHI oxygen-broadening coefficients is shown to be small, similarly to the nitrogen-broadening case, the CHI-O and CHI-air line-broadening coefficients calculated for the fundamental can be used for other perpendicular and parallel bands.
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Dates et versions

hal-03593580 , version 1 (02-03-2022)

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Citer

L. Troitsyna, A. Dudaryonok, N. Filippov, N. Lavrentieva, J. Buldyreva. Oxygen- and air-broadening coefficients for the CH 3 I ν 6 fundamental at room temperature. Journal of Quantitative Spectroscopy and Radiative Transfer, 2021, 273, pp.107839. ⟨10.1016/j.jqsrt.2021.107839⟩. ⟨hal-03593580⟩
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